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64×222=(6+1)×2连2再连4×2
=7×2连2再连08
=14208
46×666=5×6连6再连36
=30636
64×345=7×3连4再连4×5+11×60
=21420+660
=22080
46×258=5×2连5再连6×8+33×40
=10548+1320
=11868
37×13579=435763+2222×30
=435763+66660
=502423
82×2468=184616+222×80
=184616+17760
64×543=35412-11×60 46×753=35518-22×40
=35412-660 =35518-880
=34752 =34638
73×963=72609-33×70 654×37=24528-11×30
=72609-2310 =24528-330
78×45=7×5连2×5 345×63=3×7连7再连5×7
补2 系5=3510 补5 系7=21735
4567×72=4×8连88连3×8 45678×81=4×9连999连2×9
87×45=4000-50-35 543×63=35000-770-21
=3915 =34209
6543×72=480000-8880-24 98765×54=5400000-66660-30
=471096 =5333310